Too few people consider that when a person is surprised by the course of events, it means that person either didn't know what they were talking about or had really poor judgment.
Either way, that the person was surprised is not in itself news. It's only an indicator that the person is unreliable.
We really need to do a better job of calling out surprise and then discounting the future statements of the people who, it turned out, didn't know what was going on.